We help IT Professionals succeed at work.

Purchased a spare power adapter for a Dell Inspiron laptop and now the spare adapter and original adapter will not charge the laptop

mkramer777
mkramer777 asked
on
I have a Dell Inspiron 5000 series. I don’t have the computer with me this is for a user and purchased a computer for. I think it says Dell Inspiron 15 on the front. Anyway, this employee wanted a spare power adapter so I bought them one directly from Dell. It looks a tiny bit different but it is a Dell power adapter and it has the same power specs on the back. He plugged in this new power adapter and turned on the computer and noticed that it would charge for about two minutes and then say not charging. So he turned off the computer plugged in the original power adapter and now that power adapter will not charge this computer. I have no idea what to tell him or what the issue is. Any ideas?
Comment
Watch Question

David Johnson, CDSimple Geek from the '70s
Distinguished Expert 2019

Commented:

First thought is the battery is bad. If you replace the battery and the problem still exists then it is in the charging circuit

Robert RComputer Service Technician

Commented:
some times the knock off adapters will not be detected properly, and will not charge the batteries, only powering up the laptop. But if you say the power adapter you have purchased was from Dell, then it definitely should be a genuine Dell product. Are you confident that the old adapter was charging the battery before you plugged in the new one?  You can check in the bios to see if both adapter are detected properly and if they are actually charging the battery.  What is the percentage of charge of the battery, maybe the battery is already fully charged, you can see the stats in the bios.   You can also run diagnostics on the charging system. Turn off the laptop, then turn it on and then start tapping the f12 key as soon as you see the Dell logo, then in the menu select diagnostics. The diagnostics should run tests on the charging system.
when the user plugs the ac adapter into the laptop does the plug seem loose? If so it may be a bad connector and that would need to be replaced.
Dr. KlahnPrincipal Software Engineer

Commented:
It's common for charging ports to be damaged where they connect to the motherboard.  The thin copper traces on the PCB won't take much flexing before they break.

If this is the situation, then it can be diagnosed by attaching the known-good original adapter, then slowly wiggling the power cord connector where it enters the case.  If the charge light flickers, the charging port is damaged.

Diagnose the battery by taking it to an identical laptop, plugging it into that one, and see what the second laptop has to say about the battery.

Author

Commented:
Another power adapter from an identical computer does not charge the laptop.  Here is another thing the user told me:  He said that the computer is plugged in and at 85%.  The battery stays at 85% and does not go down or up.  It has been like this for the past 2 hours.
Robert RComputer Service Technician

Commented:
The battery is probably reaching the end of its life, once the battery does not fully charge then you know that the battery needs to be replaced soon.  As this is a typical symptom it will not fully charge.  That goes for even Cell phone batteries as well, when it takes for ever to charge to 100 percent, or if the charge does not last long you know that battery is reaching the end of life. Read the following articles about the battery life in your computer: https://www.cellphonerepair.com/signs-replace-your-laptop-battery/   and this article that talks about a utility to test your battery life: https://www.howtogeek.com/172362/how-to-know-when-its-time-to-replace-your-laptops-battery/
and finally  to download the battery utility: http://www.nirsoft.net/utils/battery_information_view.html

Author

Commented:
Forgot to mention this is a brand new computer. 1 week old
David Johnson, CDSimple Geek from the '70s
Distinguished Expert 2019

Commented:
return it as defective.
Computer Service Technician
Commented:
definite, you need to get your money back or exchange it for one that works properly.